Paper-bag machine.



G. F. SMITH,

PAPER BAG MACHINE.

APPLICATION rngnn JAN. sq, 1-912.

PatentedSept. 30, 1913.

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, Inventor Charla; E Smith 0, 11 SMITH, PAPER BAG MACHINE. APPLICATION PILED'JAN. so. 1912.

Patented Sept. 30', 1913.

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APPLICATION FILED JAN. 30, 1912.

' 1,074,330, Patented Sept. 30, 1913..

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- G..P. SMITH. PAPER BAG' MACHINE APPLIOATION FILED JAILBO. 1912.

Patented Sept. 30, 1913. 7

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dtforhizg STATES Pan To all whom it'mayconoern:

CHARLES F. SMITH, F BRIDGEPORT, CONNECTICUT, ASSIGNOR TO HOWLAND BAG AND PAPER COMPANY, OF DEXTER,

NEW YORK, A CORPORATION OF NEW YORK.

PAPER-BAG MACHINE.

Specification of Letters Patent.

Patented Sept. 30, 1913.

Application filed January 30, 1912. Sei ial No. 674,238.

Be it known that I, CHARLES F. SMrrrr, a citizen of the United States, and a res1- dent of Bridgeport, in the county of Fairfield andState of Connecticut, have invented certain new and useful Improvements in Paper-Bag Machines, of which the following is a specification.

those' parts of such. a paper bag machine as Thls invention relates to paper bag machines of that class which is adapted for forming fromtubular blanks, having opposite inwardly folded tucks,fpaper bags commonly' known as self-opening square paper bags.

.My improvements pertain directly to .are provided-for forming the well known diamond fold.

The object of my improvements is to provide simple and reliable means to that end.

In the drawings accompanying this specification Figure 1 is a sectional side elevation of so much of a paper bag machine of the class specified as will serve to illustrate my improvements. Fig. 2 isa plan view corresponding with -Fig. 1 and Fig. 3 is a cross sectional elevation substantially on line 3, 3, of Fig. 2. Figs. 4 to 9 inclusive arediagrammatic side elevations illustrating successive steps inthe operation of my 'improved mechanism.

elusive are detail views illustrating the operation of the turnover side clips. Fig. 15 is a detail plan view corresponding with Fig. 9 showing the completion of the diamond fold.-

Rotatable carrier 20 is fixed to main shaft 21 mounted in sleeve-like bearings 22, 23

fixed to and inreaching from side frames 18, 19 respectively. Said shaft 21 may be rotated from some convenient source of power not shown and motion transmitted therefrom to the several moving parts by gearin'g more fully described hereinafter. Cara portion of its elements at A, a portion at B and a portion at C, so as to clearly 'show the several details thereof. It will be i understood however that saidportions of posed at each one of said Figs. 10 to 14 inelements A, B and C are in reality superpositions of Fig. 1 as clearly shown in Figs. 2 and 3. The principal moving parts, mounted for revolution on carrier 20 areactuated'from fixed cams, as 24, .25 mounted on sleeves 22, 23 respectively according. to well known'practice.

At the upper left hand, Fig. 1, feed segment 26 is fixed to shaft 27- and coacts withfeed roll 28 fixed to shaft 29. Roll 28 projects upwardly through table 30 supported from bracket 81 on rod 32. Said segment 26 isprovided with creasing blade 48 for coactionwith groove 49 of roll 28 for forming the ,main transverse crease in the bag blank, see Fig. 4. Shafts 27 and 29 have gears 33, 35 fixed to their ends respectively, outboard frame 18 and through intermediate gear 34 are actuated from main gear 36 on shaft 21. I Carrier 20 is also provided with peripheral folding-beds, eglualin number to and for coaetion with t e several folding devices respectively hereinbefore' mentioned. These folding-beds each comprise a rearward portion as 13 fixed relatively to carrier 20 and terminating forwardly at 14 coincidentwith the main transverse folding line; another or mid-portion 15 of the folding-bed. is pivotally mounted coincident with said transverse folding line 14 and in its-normal position extends 'f'orwardly in coincidence with periphery 10 of carrier 20 to 16, at or beyond t-heleading corners of the diamond fold, Fig. 15; I may also provide a forward portion 17 coincident with periphery 10 and fixed relatively to carrier 20. Said portion 17 extends from the forward edge 16 of mid-portion 15, forwardly for coaction with front clip 37. It is obvious however that mid-portion 15 could extend forwardly for engagement with front clip 37 if desired and forward portion 17 be omitted.

Mid-portion is fixed to shaft 38 having hearings in side frames 11 and 12 of carrier 20 and said shaft may be oscillated through about 180 degrees by means of the gearing illustrated at C, Fig. 1, and shown in plan at the right hand side of Fig. 2. Gear 39 fixed to shaft 38 is driven from gear 41 through intermediate gear 40. Said gear 41 is mounted onthe free end at 44, concentric with intermediate gear 40,, and meshes with fixed circular rack 43.

D Movement of gear 41 about pivot 44 is had -"idisposed side grippers 51, 52 fixed to the inreaching ofiset ends 53, 54 of sleeves 55, 56 slidably mounted on and coaxial with opposite portions of shaft 38 all respectively.

- Said sleeves 55, 56 are prevented from turnpreferably pivotally mount offset ends as 54 ing relatively to shaft 38 by keys as 400 in said shaft in engagement with slots or keyways as 50 in sleeve 56. Said gripper carrying sleeves as 56 may be slid in and out relatively to the folding-bed by means of arm 57 pivoted midway'its length at 58 in carrier 20 and having one end thereof pivotally connected at 59 with said sleeve and having at its other end roll 60 for engagement with cam 600 fixed to sleeve 23. For moving said grippers 51, 52 up and down relatively to said mid-portion 15 of the folding-bed I at 61 onthe inner end of sleeve 56, see Figs. 11 to 14 inclusive. Said end 54 is provided Q with an inwardly and downwardly reaching arm 62 .for engagement with cam 63 on Shaft 64 in carrier 20. The coacti'on-of said cam 63 and arm 62 is efiicient to move gripper 52 upwardly and spring pressed plunger 5 is efficient to move'said gripper downwardly when permitted by said cam. Said cam is provided with cam path 66 and peripheral portion 67 for engagement with arm 62 the detail operation of which is more fully set forth'later herein. Cam shaft 64 is oscillated by the following means: Gear 68 fixed to said shaft is engaged by segment gear 69 turning on stud 70 fixed incarrier' 20; arm 71 of segment gear 69 'has roll 72 .thereon forv engagement with cam 24 fixed to sleeve 22. v A

The usual front clip 37 is pivotally lnount I ed at 76in carrier 20 and has arm 7 7 carrying .roll 78 for engagement with cam 25 fixed to sleeve 23.

.' tatably mounted below and gas , thereto for actuating Said front clip may be urged to its work by ,the usual spring pressed For gripping the upper plies of ,the bag to the body of the bag and both to the rear portion 13 ofthe folding-bed after midportion 15 has been turned. backwardly on its pivot for folding the leading end of the provide a pair of op-- positely disposed side-clips 73, 74 pivotally mounted, as at 82 on carrier 20, at opposite sides of said folding-bed. Shaft 79 is rotransverse said folding-bed and at one end has arm 80 fixed clip 74 and at the other end has arm 81 fixed thereto for actuating clip-73. Clip 74 is fixed to one end of shaft pressed plunger 88 engaging ears 89, 90 of arm 83 and opposite arm 84 respectively. For turning inwardly'the sides of the box shape into which the leading end of the blank'is opened preparatory, to folding it down into the diamond form I provide a pair of oppositely disposed fingers 91, 92'

conveniently supported on cross bar 93 reaching from'side frame 18 'to side frame 19. Said fingers 91, 92 are bent inwardly at their-ends 95, 96 and as the box shaped blank passes therebetween its sides are turned inwardly and downwardly.

Closely adjacent to ends95, 96 of fingers 91, 92 in the direction of travel of the folding-bed, are fixed ironing blades 97, 98 and rotary folders 99, 100. Blades 97, 98.are supported from -cross bar 93 and reach downwardly to substantial tangency with the passing folding-beds. These blades 97, 98are spaced apart vvidthwise, to overhang iron the edges of the diamond fold and to provide room for the passage of rotary folders 99, 100 therebetween. Rotary fold-- ers 99, 100 are curved members mounted ooaxially' on shaft. 101 adjacent to carrier 20 for revolution approximately tangent thereto. Rotary folder 99 is provided for folding the forward or leading end of the diamond fold and delivering tliat leading end to front the edges of the folding-bed (see F ig. 2) to clip 37. Said folden99 is' mounted oiif arm 102 fixed tosaid. shaft 101 and is actuated at a speed in excess of the speed of the foldingbed, preferably twice as fast, so as to wipe through underthe-side folds, laying the bottom of the diamond fold fiatand then passing onwardly out of the way of folder 100.

Fixed to the outboard end of shaft 101- adjacent to side frame 18 is gear 1030 driven through intermediates 104 main gear 36.

Rotary folder 100 is provided for folding the rearward end of the diamond fold and is preferably actuated at about the same speed as thatof the folding-bed so as to have a rolling coaction therewith or slightly slower so as to wipe backwardly over the rear portion of the diamond fold. Said folder'100is mounted on arm 103 fixed to the inner end of sleeve1040 loosely mounted and 1 05 from on shaft 101. Fixed to the outer end of said 1 sleeve is segment gear 1050 meshing wit-h segment gear 106 fixed to one end of shaft- 107. Said shaft has a bearing in-the outer end of arm 108 fixed to shaft 101. To the other end of shaft 107 is fixed arm 109 bearing in the end thereof roll 110 in engagement with cam 111 fixed to sleeve 112, in-

and folder 100 to oscillate relatively to shaft',

101 while revolving with that shaft. That g' relati've oscillationretards the actual movement of folder 100 during its coaction with l -a folding-bed of carrier and accelerates thatmove'ment during-itsidle travel. That retardation is preferably just sufficient to "cause said folder 100 to move during its coaction with the folding-bed at thespeed of that folding-bed. v v

The operation of my improved mechanis'm is as follows':, Main, shaft 21 being 15 started in the direction of its arrow Fig. 1, aglsuitable tubular blank is delivered "over table timed to receive its main transverse ,crease'at the proper distance from its leadingi 'end, by m'eans of creaser48 in coaction 20 with groove 49 in roll 28 (Fig. 4). After being creased the blank is advanced by the coaction of feed segment 26 and roll 28 to over one ofthe advancing folding-beds and :in time therewith, to deliver the blank with its'transverse crease directly over the transj'; verse line of meeting 14 of folding-bed por- {tions 13 and 15"(Fig. 5). At this time side grippers 51, 52 are in raised and retracted positions relatively to the folding-bed iasfshown in Figs. 11 and 12. Thereupon by jzthe engagement of rolls as with their fixed cams as 600 sleeves as 56 are moved inwardly, arms as 62 riding on the high part 'of'their cams as 63 and the grippers 51, 52 hntering' the opposite tucks of the bag blank.

sitions respectively (Fig. 13) cams as 63 are rocked on their axes by the engagement of roll 72 with its fixed cam 24 (Fig.14s) and arms as 40 "62 drop under pressure of spring plungers as v the transverse crease previously formed. m This backwardturning of mid-portion 15- f .carri'es grippers 51, 52 therewith and causes fiia'r'm B2 to leave cam 63, said cam bein cut -:away at 66 to permit such leaving Without- 'jnterference (Figs. 11 'and 14),. Then roll 53 -8fi inengagement with cam 87 permits side clips 73, 74; to swing inwardly under the pressure of spring urged plunger 88. Said clips 73, 7 1 thereupon engage the opposite 1 I jlpper plies respectively of the bag blank, 3 now. folded over anddownwardly against the bag body and clamp those plies and said bag body against the rear portion 13 of the folding-bed (Figs. 1, 2 and 6). ,Then midportion '15; reverses its previous direction of 3' rotative'movement and turns forwardly to As said grippers 51, 52 reach their inward poits former position coincident with the general' contour of the folding-bed. In thus turning forwardly'the lower plies offihe bag blank which are gri ped to said portion 15 are taken with it, t eup'per plies being in the grip of clips 73, 7 1 against fixed portion 13; the forward end of the blank is thus opened out into box shape (Fig. 7). Said box folded blank then encounters and passes between the inwardly turned ends 95, 96 of fingers 91, 92 whereby the sides of the box shape are turned inwardly in position for the action thereon of ironing blades 97, 98 and of rotary folder 99. Just as the bag blank passes under said ironers 97, 98 folder 99 rotates swiftly in the direction of travel of the bag blank and passes between ironcrs 97, 98 and bet-ween and under sides 115, 116 (Fig. 15) and over front flap 117 delivering that flap against the folding-bed, and in position for engagement byfrontgripper 37 which thereupon closes onto the leading end of said front fiap (Fig. 8). Rotary folder 99 then passes onwardly about its shaft 101 and rotary folder 100, being now retarded to the speed of the folding-bed rolls in coaction therewith to roll down the rearward end of known character for completing the 'bag-v bottom but which mechanisms beingno partof the present improvements are not shown.

I-claim:-- V

1. A paper bag machine including in combination, a folding-bed, having a fixed rear portion, and having another portion pivotally mounted coincident with the main transverse folding line and extending forwardly therefrom, means for gripping the lower plies of a bag blank to said other portion and means for turning said other portion backwardly on its pivot for foldingthe leading end of the blank onto its body against said folding-bed rear portion.

-2. A paper bag machine including in combination, a folding-bed, having a fixed rear portion, and having another portion pivotally mounted coincident with the main.

transverse folding line and extending forwardly therefrom, means for grippingthe lower plies of a bag blank to said other porally mounted coincident with the main. 7

transverse folding line extending forward-1y therefrom, meanssfor gripping the V lower plies of a bag blank to said other portion, means forturning said other portion backwardly on its pivotfor folding the leading and of the blank onto its body and forwardly for opening out the blank into box shape, means for gripping the upper plies of the bag blank to its bodyand to the rear portion of saidfolding-bed when the folding-bed other portion is in its backward position.

4. A paper bag machine including in combination, a rotatable carrier, a folding-bed thereon, means for gripping the lower plies of the bag blank to said folding-bed, means for opening out the forward end of the bag I blank into box shape,rotary meansfor fold- .Wardly the sides of the box shape, rotary means for folding the forward end of the diamon the front clipand rotary means for olding the rearward end of the diamond, said forward and rearward end folding means being mounted on a common fixed axis adjacent to said carrier.

6. A paper bagmachine including in com} bination, a rotatable carrier, a folding-bed thereon, means for gripping the lower plies of a bag blank to said folding-bed, means-for opening out the. forward end of the bag blank into box shape, rotary means for foldingthe forward end of the diamond and delivering it into the grip of the front clip, rotary means for folding the rearward end of the diamond, said forward and rearward end folding means being mounted on a common fixed axis adjacent to said carrier,

means for actuating said forward end foldmg means at a speed in excess of the speed of the folding-bed and means for actuating said rearward end-foldin means at a speed other than the speed of the forward end folding m'eansf i 7. A paper bag ma'chine including in com- I bination, a rotatable carrier, a folding bed of the diamond, said forward and. rearwardend folding meansbeing mounted on a comthereon, means forgripping the lower plies of a bag blank to said folding-bed, means for opening out the forward end of the bag blank into box shape, rotary means for folding the forward end' of the diamond and delivering it into the grip of the front clip, rotary means for folding the rearward end mon fixed axis adjacent. to said carrier,

means foractuating said forwardend foldand deliveringit into the rip of ing means at a speed in excess of thespeed of the folding-bed and means for actuating said rearward end folding means at one speed during, one part of its revolution and at another speed during another, part of its revolution. t

8. A paper bag machine including in combination, a rotatable carrier, a folding-bed thereon, meansfor gripping the lower plies of a bag blank to said folding-bed, means for openin 'out 'the forward end of the b b fol d blank into box shape, rotary means for ing the forward end of the diamond and delivering it into the grip of the front clip, rotary means for fol ing the rearward end of the diamond, s'aid forward and rearward end folding means being mounted on a common fixed axis adjacent to said carrier, means for actuating sald, forward end folding means at a speed in excess of the'speed of the folding-bed and means for actuating said rearward end folding means at the speedof the folding-bed during its coaction therewith and at other speedsduring other parts of its, revolution.

- 9. A paper bag machine including in combination, .a rotatable carrier, a-fold1ng-bed thereon having a rear portion fixed relativel to said carrier, and havin another portion ,pivotally mounted coinci out with the main transverse folding line and extending forwardly therefrom, means for grip-i ping the lower plies of a bag blank tosaid other portion comprising a pair of oppo-, sitely disposed side ippers slidably mounted coaxially with sald folding-bed other portion, means for slidin said grippers trans= versely in'and out re atively to said other portion and means for moving said grippers up and down relatively tojsaid-other prtion. 10. A paper bag machine inclu mg in combination, a rotatable carrier, a folding:

bed thereon having a rear portion fixed relatively, to said carrier, and having another portion pivotally mounted coincident with the main transverse folding line and extending forwardly therefrom, means for gripping the lower'plies of a bag blank to said other portion comprising a pair of oppositely disposed slidable members mounted coaxially with :said folding-bed other portion for rotation therewith and for movement in and out relatively thereto, a pair of oppositely disposed side grippers vpivotally mounted on the inner ends of said slidable members respectively, means for sliding said slidable members in and out relatively to said "other portion, means for rocking said grippers on their pivots and means for timing the sliding means for the slidable members with-the means for rockingthe grippers.

11. A paper bag machine including in combination, a, rotatablercarrier, a foldingbed thereon having a rear portion fixed relatively to said carrier and having another r bed 'th'ereon,

portion pivotallymounted coincident with the main transverse folding line and extending forwardly therefrom, means for gri ping the lower plies of a bag blank to said other portion, a slidable member mounted coaxially with said folding-bed other portion for rotation therewith and for movement in and out relatively thereto, means for sliding said slidable member in and out relatively to said other portion, a side--gripper pivotally mounted on said slidable member, a rotatable cam adjacent to said slidable member, means on the side-gripper for engagement with said cam, a face on said cam for lifting said side-gripper as said gripper moves away from the folding-bed other portion and means for rotating said cam for lowering said gripper in its inner position.

12. A paper bag machine includin in combination, a rotatable carrier, a fol ing-' means for gripping the lower plies of a bag blank to said folding-bed, comprising a slidable member mounted for movement in and out relatively to said folding-bed, means for sliding said slidable member in and out relatively to said foldingbed, .a side-gripper pivotally mounted on said slidable member, a rotatable cam adjacent to said slidable member, means on the side-gripper for engagement withsaid cam,- a face on said cam for lifting said side:

gripper as said gripper moves away from the folding-bed and means for rotating said cam for lowering said gripper in its inner position.

13. A aper bag machine including in combination, a rotatable carrier, a foldingbed thereon having a rear portion fixed relativel to said carrier, and having a midportion pivotally mounted'coincident with the main transverse folding line and extending forwardly therefrom, means for gripping the lower plies of a bag blank to said mid-portion comprising a slidable member mounted coaxially with said foldingbed mid-portion for rotation therewith and for movement inand out relatively'thereto and means for moving said slidable member in and out; a side-gripper pivotally mounted on said slidable member, a rotatable cam adjacent to said slidable member means on the side-gripper for engagement with said cain, aface on said cam for lifting said sidegripper as said gripper moves away from the folding-bed mid-portion and means for rotating said cam for lowering said gripper in its inner position.-

Signed at New York, in the county of New York and State of New York, this 29th day of'January 1912, before two subscribing witnesses.

CHARLES F. SMITH.

Witnesses:

LA For G. BARBER, CHAS. W. LA Run. 

